/**
 *    Copyright ${license.git.copyrightYears} the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider;

import static org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities.getSelectListPhrase;
import static org.mybatis.generator.internal.util.StringUtility.escapeStringForJava;

import java.util.List;
import java.util.Set;
import java.util.TreeSet;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class ProviderSelectByExampleWithoutBLOBsMethodGenerator extends AbstractJavaProviderMethodGenerator {

  public ProviderSelectByExampleWithoutBLOBsMethodGenerator(boolean useLegacyBuilder) {
    super(useLegacyBuilder);
  }

  @Override
  public void addClassElements(TopLevelClass topLevelClass) {
    Set<String> staticImports = new TreeSet<String>();
    Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();

    if (useLegacyBuilder) {
      staticImports.add("org.apache.ibatis.jdbc.SqlBuilder.BEGIN"); //$NON-NLS-1$
      staticImports.add("org.apache.ibatis.jdbc.SqlBuilder.SELECT"); //$NON-NLS-1$
      staticImports.add("org.apache.ibatis.jdbc.SqlBuilder.SELECT_DISTINCT"); //$NON-NLS-1$
      staticImports.add("org.apache.ibatis.jdbc.SqlBuilder.FROM"); //$NON-NLS-1$
      staticImports.add("org.apache.ibatis.jdbc.SqlBuilder.ORDER_BY"); //$NON-NLS-1$
      staticImports.add("org.apache.ibatis.jdbc.SqlBuilder.SQL"); //$NON-NLS-1$
    } else {
      importedTypes.add(NEW_BUILDER_IMPORT);
    }

    FullyQualifiedJavaType fqjt = new FullyQualifiedJavaType(introspectedTable.getExampleType());
    importedTypes.add(fqjt);

    Method method = new Method(getMethodName());
    method.setVisibility(JavaVisibility.PUBLIC);
    method.setReturnType(FullyQualifiedJavaType.getStringInstance());
    method.addParameter(new Parameter(fqjt, "example")); //$NON-NLS-1$

    context.getCommentGenerator().addGeneralMethodComment(method, introspectedTable);

    if (useLegacyBuilder) {
      method.addBodyLine("BEGIN();"); //$NON-NLS-1$
    } else {
      method.addBodyLine("SQL sql = new SQL();"); //$NON-NLS-1$
    }

    boolean distinctCheck = true;
    for (IntrospectedColumn introspectedColumn : getColumns()) {
      if (distinctCheck) {
        method.addBodyLine("if (example != null && example.isDistinct()) {"); //$NON-NLS-1$
        method.addBodyLine(String.format("%sSELECT_DISTINCT(\"%s\");", //$NON-NLS-1$
            builderPrefix, escapeStringForJava(getSelectListPhrase(introspectedColumn))));
        method.addBodyLine("} else {"); //$NON-NLS-1$
        method.addBodyLine(String.format("%sSELECT(\"%s\");", //$NON-NLS-1$
            builderPrefix, escapeStringForJava(getSelectListPhrase(introspectedColumn))));
        method.addBodyLine("}"); //$NON-NLS-1$
      } else {
        method.addBodyLine(String.format("%sSELECT(\"%s\");", //$NON-NLS-1$
            builderPrefix, escapeStringForJava(getSelectListPhrase(introspectedColumn))));
      }

      distinctCheck = false;
    }

    method.addBodyLine(String.format("%sFROM(\"%s\");", //$NON-NLS-1$
        builderPrefix, escapeStringForJava(introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime())));
    if (useLegacyBuilder) {
      method.addBodyLine("applyWhere(example, false);"); //$NON-NLS-1$
    } else {
      method.addBodyLine("applyWhere(sql, example, false);"); //$NON-NLS-1$
    }

    method.addBodyLine(""); //$NON-NLS-1$
    method.addBodyLine("if (example != null && example.getOrderByClause() != null) {"); //$NON-NLS-1$
    method.addBodyLine(String.format("%sORDER_BY(example.getOrderByClause());", builderPrefix)); //$NON-NLS-1$
    method.addBodyLine("}"); //$NON-NLS-1$

    method.addBodyLine(""); //$NON-NLS-1$
    if (useLegacyBuilder) {
      method.addBodyLine("return SQL();"); //$NON-NLS-1$
    } else {
      method.addBodyLine("return sql.toString();"); //$NON-NLS-1$
    }

    if (callPlugins(method, topLevelClass)) {
      topLevelClass.addStaticImports(staticImports);
      topLevelClass.addImportedTypes(importedTypes);
      topLevelClass.addMethod(method);
    }
  }

  public List<IntrospectedColumn> getColumns() {
    return introspectedTable.getNonBLOBColumns();
  }

  public String getMethodName() {
    return introspectedTable.getSelectByExampleStatementId();
  }

  public boolean callPlugins(Method method, TopLevelClass topLevelClass) {
    return context.getPlugins().providerSelectByExampleWithoutBLOBsMethodGenerated(method, topLevelClass,
        introspectedTable);
  }
}
